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path: root/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c
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Diffstat (limited to 'drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c')
-rw-r--r--drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c37
1 files changed, 29 insertions, 8 deletions
diff --git a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c
index 9bb3222c95b9..cdfec03bf1a4 100644
--- a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c
+++ b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c
@@ -1081,6 +1081,7 @@ static const struct component_ops sun6i_dsi_ops = {
static int sun6i_dsi_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
+ const char *bus_clk_name = NULL;
struct sun6i_dsi *dsi;
struct resource *res;
void __iomem *base;
@@ -1094,6 +1095,10 @@ static int sun6i_dsi_probe(struct platform_device *pdev)
dsi->host.ops = &sun6i_dsi_host_ops;
dsi->host.dev = dev;
+ if (of_device_is_compatible(dev->of_node,
+ "allwinner,sun6i-a31-mipi-dsi"))
+ bus_clk_name = "bus";
+
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
base = devm_ioremap_resource(dev, res);
if (IS_ERR(base)) {
@@ -1107,25 +1112,35 @@ static int sun6i_dsi_probe(struct platform_device *pdev)
return PTR_ERR(dsi->regulator);
}
- dsi->regs = devm_regmap_init_mmio_clk(dev, "bus", base,
- &sun6i_dsi_regmap_config);
- if (IS_ERR(dsi->regs)) {
- dev_err(dev, "Couldn't create the DSI encoder regmap\n");
- return PTR_ERR(dsi->regs);
- }
-
dsi->reset = devm_reset_control_get_shared(dev, NULL);
if (IS_ERR(dsi->reset)) {
dev_err(dev, "Couldn't get our reset line\n");
return PTR_ERR(dsi->reset);
}
+ dsi->regs = devm_regmap_init_mmio(dev, base, &sun6i_dsi_regmap_config);
+ if (IS_ERR(dsi->regs)) {
+ dev_err(dev, "Couldn't init regmap\n");
+ return PTR_ERR(dsi->regs);
+ }
+
+ dsi->bus_clk = devm_clk_get(dev, bus_clk_name);
+ if (IS_ERR(dsi->bus_clk)) {
+ dev_err(dev, "Couldn't get the DSI bus clock\n");
+ return PTR_ERR(dsi->bus_clk);
+ }
+
+ ret = regmap_mmio_attach_clk(dsi->regs, dsi->bus_clk);
+ if (ret)
+ return ret;
+
if (of_device_is_compatible(dev->of_node,
"allwinner,sun6i-a31-mipi-dsi")) {
dsi->mod_clk = devm_clk_get(dev, "mod");
if (IS_ERR(dsi->mod_clk)) {
dev_err(dev, "Couldn't get the DSI mod clock\n");
- return PTR_ERR(dsi->mod_clk);
+ ret = PTR_ERR(dsi->mod_clk);
+ goto err_attach_clk;
}
}
@@ -1164,6 +1179,9 @@ err_pm_disable:
pm_runtime_disable(dev);
err_unprotect_clk:
clk_rate_exclusive_put(dsi->mod_clk);
+err_attach_clk:
+ if (!IS_ERR(dsi->bus_clk))
+ regmap_mmio_detach_clk(dsi->regs);
return ret;
}
@@ -1177,6 +1195,9 @@ static int sun6i_dsi_remove(struct platform_device *pdev)
pm_runtime_disable(dev);
clk_rate_exclusive_put(dsi->mod_clk);
+ if (!IS_ERR(dsi->bus_clk))
+ regmap_mmio_detach_clk(dsi->regs);
+
return 0;
}